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M7.7 earthquake, Greece, 1956-07-09

MagnitudeM7.7mw

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Depth20 km

Time (UTC)1956-07-09 03:11

Rank in 19561 / 109among M6+

Rank since 1900254 / 14,458

Energy vs an M6×355approx.

19 km SSE of Amorgós, Greece · 36.66, 25.96

M6.5+ within 300 km (largest first)

1903 M7.9M7.9

1956 M7.7M7.7

1948 M7.3M7.3

1957 M7.3M7.3

1981 M7.2M7.2

1949 M7.2M7.2

1957 M7.1M7.1

2020 M7.0M7.0

1926 M7.0M7.0

1922 M6.7M6.7

2006 M6.7M6.7

1967 M6.6M6.6

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.6 1955-07-16	1955-07-16 07:07	15 km	9 km NW of Sar?kemer, Turkey
M6.5 1952-12-17	1952-12-17 23:04	25 km	46 km SSE of Kastrí, Greece
M7.2 1949-07-23	1949-07-23 15:03	15 km	9 km NNW of Karaburun, Turkey
M6.4 1948-07-24	1948-07-24 06:03	15 km	39 km SSW of Tympáki, Greece
M7.3 1948-02-09	1948-02-09 12:58	15 km	15 km NNW of Karpathos, Greece
M6.3 1947-08-30	1947-08-30 22:21	15 km	29 km SW of Kíssamos, Greece
M6.0 1941-05-23	1941-05-23 19:51	15 km	12 km NNE of Marmaris, Turkey
M6.2 1940-02-29	1940-02-29 16:07	15 km	16 km S of Néa Anatolí, Greece
M6.1 1938-07-20	1938-07-20 00:23	15 km	8 km NW of Fylí, Greece
M6.2 1935-02-25	1935-02-25 02:51	70 km	66 km SSW of Folégandros, Greece

Energy ratio uses the rule that one magnitude unit is about 32 times the energy. Magnitudes and locations are USGS values and can differ from national agencies. Older records are less complete and less precise.